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07-21-2018, 12:19 PM
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#1
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Senior Member
Join Date: Sep 2016
Location: Cotopaxi
Posts: 225
Colorado
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Towing air pressure on 3500 Dually ??
I have a 2018 Ram 3500 DRW 4x4 and am towing a Voltage 3600 TH. I have been running what the sticker on the door panel says 80 front and 65 rear. Any opinions?
Thanks,
SR
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2017 Ram DRW 4x4
2012 Voltage 3600
2015 Road King, 2010 Tri Glide, 2002 Heritage
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07-21-2018, 12:24 PM
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#2
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Senior Member
Join Date: Aug 2013
Location: Memphis
Posts: 1,616
Michigan
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Quote:
Originally Posted by Sandrooney
I have a 2018 Ram 3500 DRW 4x4 and am towing a Voltage 3600 TH. I have been running what the sticker on the door panel says 80 front and 65 rear. Any opinions?
Thanks,
SR
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Same here with '05, 3500
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2019 Ram 3500 Limited w/ Max Tow pkg
2005 Cardinal 33LX
2014-3950, Full Paint, 17.5" tires, 370W solar, 3100W Magnum inverter w/ AGS, 7500w diesel generator, Micro-Air Easy Start 364 (x3) SOLD!
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07-21-2018, 01:11 PM
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#3
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Senior Member
Join Date: Nov 2015
Location: Quarantine
Posts: 365
Ontario
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80 all round.
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07-21-2018, 01:45 PM
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#4
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Senior Member
Join Date: Jun 2017
Location: Wesley Chapel
Posts: 3,051
Florida
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Quote:
Originally Posted by Sandrooney
I have a 2018 Ram 3500 DRW 4x4 and am towing a Voltage 3600 TH. I have been running what the sticker on the door panel says 80 front and 65 rear. Any opinions?
Thanks,
SR
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pump them up to what it says on the tires if you have changed the tires from the originals. If not, use the door sticker.
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07-21-2018, 02:31 PM
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#5
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Senior Member
Join Date: Sep 2017
Location: Calabasas
Posts: 783
California
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There is a great forum for Ram that will have tons of information on this subject and there will likely be hundreds of members with your same truck and similar trailers. There are some super knowledgeable people over there and it seems like the members on that site are split between those that want to mod their trucks to make them faster (zero interest here) and those that tow a lot and even for a living. A few jerks too but just ignore them.
I believe the 3500 models allow you to adjust the TPMS settings in the truck so you can run lower without a warning if you are confident in what you want. In general the max psi setting will be on door sticker and those are the cold pressures you will need in order to carry the max weight. If you are under the max weight your truck is rated for you should/might be able to go with a lesser tire pressure. Most will tell you higher pressures translate to a rougher ride but obviously you need the minimum safe pressure to tow your trailer. I have a 2500 and always keep my tires at the door setting (65 front and 80 rear) for two reasons: first because I cannot adjust the TPMS settings and second because I don’t want to have to worry about upping the pressures when I go get my trailer. Also, I guess there is a third reason too in that I know under inflated tires will wear poorly and I don’t want to deal with that.
My truck is not an everyday driver so I am not striving for the perfect ride and don’t mind the higher pressures.
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2018 Voltage 3305
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07-21-2018, 02:55 PM
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#6
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Senior Member
Join Date: Feb 2014
Location: Tucson
Posts: 872
Arizona
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My door sticker says 70 front and 65 rear and the tires are wearing fine. I've weighed my 3600 and the actual weight on each tire falls into line with the air pressure chart for the tires - 65 PSI. There is no point running 80 PSI unless you like a really rough ride. BTW, when I weighed the truck and trailer the weight on the front axle was the same with and without the trailer.
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2014 Voltage 3600
2013 Chevy 3500 CC DRW
2019 RZR 1000XP Trails and Rocks Edition
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07-21-2018, 05:51 PM
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#7
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Senior Member
Join Date: Sep 2017
Location: Calabasas
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California
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I guess with dually’s because there are four tires back there they can be lower than SRW rears. Makes sense as the load on each individual rear tire would be less.
Regardless, the point I was trying to make is that you can go lower than the recommended if you are towing/hauling less.
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2018 Voltage 3305
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07-21-2018, 06:50 PM
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#8
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Senior Member
Join Date: Jun 2017
Location: Wesley Chapel
Posts: 3,051
Florida
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Quote:
Originally Posted by azdryheat
My door sticker says 70 front and 65 rear and the tires are wearing fine. I've weighed my 3600 and the actual weight on each tire falls into line with the air pressure chart for the tires - 65 PSI. There is no point running 80 PSI unless you like a really rough ride. BTW, when I weighed the truck and trailer the weight on the front axle was the same with and without the trailer.
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That's a well balanced rig...
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07-21-2018, 10:17 PM
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#9
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Senior Member
Join Date: May 2013
Location: Cody
Posts: 1,764
Wyoming
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For what it's worth... the sticker on my F-450 states 75-fronts, and 60 in the rears. I've been running those pressures for over 4 years now with even wear & no issues.
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Tom
2013 VOLTAGE 3200 (EPIC I & II)
2014 Ford F-450 PLATINUM
2018 BMW R1200GS RALLYE
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07-22-2018, 03:38 AM
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#10
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Senior Member
Join Date: Nov 2015
Location: Quarantine
Posts: 365
Ontario
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Quote:
Originally Posted by franktafl
That's a well balanced rig...
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Is it?
The weight on the rear axle has gone WAY up and the front hasn't changed? I'd say that's UNbalanced.
That's why 5th hitches are mounted in front of the rear axle - to distribute load to BOTH rear and front.
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07-22-2018, 05:04 AM
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#11
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Senior Member
Join Date: Feb 2014
Location: Tucson
Posts: 872
Arizona
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Quote:
Originally Posted by joebedford
Is it?
The weight on the rear axle has gone WAY up and the front hasn't changed? I'd say that's UNbalanced.
That's why 5th hitches are mounted in front of the rear axle - to distribute load to BOTH rear and front.
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Well, I guess your the expert. I'll call the manufacturer of my hitch and tell them that someone on the internet says their installation instructions are not correct.
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2014 Voltage 3600
2013 Chevy 3500 CC DRW
2019 RZR 1000XP Trails and Rocks Edition
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07-22-2018, 09:56 AM
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#12
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Senior Member
Join Date: Sep 2016
Location: Cotopaxi
Posts: 225
Colorado
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Thanks for all the help. I will go by what the door sticker says.
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2017 Ram DRW 4x4
2012 Voltage 3600
2015 Road King, 2010 Tri Glide, 2002 Heritage
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07-22-2018, 12:04 PM
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#13
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Senior Member
Join Date: Feb 2017
Location: Sanger
Posts: 376
Texas
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I agree with the sticker as well. My 18 Ram stays 80/65. The new Cummins is heavier and so is the Aisin transmission plus all this new electronic stuff..lol
The tires are designed for that pressure and with a dually the weight us shared, hence the 65 psi requirement.
Air them up!
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Chris & Donna
2014 Voltage Epic 3990, 600AH LifeBlue, 1895W Solar, 3K Magnum w/AGS, 3X Micro-Air ES
2018 RAM 3500 Laramie Sport Crew Cab 6.7 Cummins, AISIN 4X4 DRW 4.10 Long Bed Dually
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07-22-2018, 12:11 PM
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#14
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Senior Member
Join Date: Jun 2017
Location: Wesley Chapel
Posts: 3,051
Florida
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Quote:
Originally Posted by joebedford
Is it?
The weight on the rear axle has gone WAY up and the front hasn't changed? I'd say that's UNbalanced.
That's why 5th hitches are mounted in front of the rear axle - to distribute load to BOTH rear and front.
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How can that be possible that his 5th wheel doesn't put any weight on the front axle unless his hitch is directly above the rear wheels and possible airbags.
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07-22-2018, 03:27 PM
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#15
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Senior Member
Join Date: Nov 2015
Location: Quarantine
Posts: 365
Ontario
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You'll not sucker me into a debate about my expertise. But go to the websites that talk about hitch installation and see what they say: the hitch should be slightly in front of the rear axle. Does that mean that no manufacturers put the hitch further back? I wouldn't know.
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07-22-2018, 03:31 PM
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#16
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Senior Member
Join Date: Nov 2015
Location: Quarantine
Posts: 365
Ontario
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Quote:
Originally Posted by franktafl
How can that be possible that his 5th wheel doesn't put any weight on the front axle unless his hitch is directly above the rear wheels and possible airbags.
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It's not possible - his hitch has to be right over the rear axle.
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07-22-2018, 04:14 PM
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#17
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Senior Member
Join Date: Jun 2017
Location: Wesley Chapel
Posts: 3,051
Florida
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Quote:
Originally Posted by joebedford
You'll not sucker me into a debate about my expertise. But go to the websites that talk about hitch installation and see what they say: the hitch should be slightly in front of the rear axle. Does that mean that no manufacturers put the hitch further back? I wouldn't know.
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nobody's questioning your expertise! Just wondering how he could have no difference in weight on this front end with a loaded rv. easy now!
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07-22-2018, 04:34 PM
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#18
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Senior Member
Join Date: Nov 2015
Location: Quarantine
Posts: 365
Ontario
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Quote:
Originally Posted by franktafl
nobody's questioning your expertise! Just wondering how he could have no difference in weight on this front end with a loaded rv. easy now!
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My comment about expertise was not directed at you - someone else did the questioning.
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07-26-2018, 09:26 PM
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#19
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Member
Join Date: Nov 2012
Location: Centennial
Posts: 35
Colorado
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I use the tire manufacturer's inflation chart for the specific tire I am using. Based on my scaled weights, I run 65 psi in all 6 tires, whether I am towing or not. I could probably reduce the pressure when I am not towing, but it is too much of a hassle to reinflate to tow.
My weights are as follows: truck only, front - 4,960 lbs, rear - 3,800 lbs for a total of 8,760 lbs. with my toy hauler but little to no cargo, hitched the weights are front - 4960 lbs, rear 6,850 lbs for total on the truck of 11,540 lbs with 2,780 lbs on the pin.
I have a B&W Turnover Ball hitch and 5th Wheel Companion. I believe that B&W's recommendation is to mount the turnover ball receptacle directly over the axle. The 5th Wheel Companion does allow for some forward and backward adjustment, maybe two inches. In any case based on no change in the front axle weight, my pin must be directly over the rear axle.
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2015 GMC Sierra SLT 3500 CC long bed
2012 Voltage 3200
2006 KLR650
2002 Suzuki DRZ400E
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